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W. A. LORENZ 86 E. "E. CLAUSSEN. PROCESS OF MAKING PIAPER BAGS.

No. 519,916. Patented May 15, 1894.

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W. A. LORENZ & E. E. OLAUSSEN; PROCESS OF MAKING PAPER BAGS.

Patented May 15,1894.

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PROCESS OF MAKING PAPER BAGS.

No. 519,916. Patente d.Ma1y 15,1894.

Big]? UNITED STATES PATEN OFFICE.

WILLIAM A. LORENZ AND EDWARD E. CLAUSSEN, OF HARTFORD, CONNECTI- CUT,ASSIGNORS TO ALBERT H. WALKER, TRUSTEE, OF SAME PLACE.

PROCESS OF MAKING PAPER BAGS.

SPECIFICATION forming part of Letters Patent No. 519,916, dated May 15,1894.

Applicationfiled August 18,1892. SerialN0.443,360- (No model.)

To all whom it may concern.-

Be it known that we, WILLIAM A. LORENZ and EDWARD E. CLAUssEN, citizensof the United States, residing at Hartford, in the and shown in RcissuedLetters Patent No.

10,083, of April 11, 1882.

Figure l is a plan view of alength of tucked paper tube, such as haslong been Well known in the art of making such bags. Figs. 2 and 3 arean edge and an end View respectively of the blank of Fig. 1. Fig. 4 is aplan view of the blank of Figs. 1, 2 and 3, after the first step of ournew process has been performed thereon; and Fig. 5 is a view of thelower edge of Fig. 4. Fig. 6 is a view of the completed bag with bothflaps of the diamond folded and pasted down. Fig. 7 is a plan view ofthe blank of Fig. 1 with various instrumentalities shown in connectiontherewith. Fig. 8 is a view of the lower edge of Fig. 7. Fig. 9 is aplan view of what is shown in Fig. 7, showing the blank partly folded.Fig. 10 is a view of the lower edge of Fig. 9. Figsrll and 13 are planviews representing successive stages in the folding operation, and Figs.12 and 14 respectively are side views thereof. Fig. 15 is a plan viewshowing the completion of the first step in the folding of the bottom.Fig. 16 is a plan view of what is shown in Fig. 15, excepting that thefolding operation is not carried quite as far as in that figure. Figs.17 and 18 are respectively plan and side views of the blank of Fig. 16,showing instrumentalities for supporting and folding the rear flap ofthe diamond. Fig. 19 is a plan view of the blank, showing the rear flapfolded over upon the bottom. Fig. 20 is a view of the lower edge of Fig.19. Fig. 21 is a perspective view of the bag blank as folded in Figs. 11and 12. Fig. 22 is a perspective view of the folded bag blank as itwould appear in Fig. 15, were the blank to be released from the forwardgripper shown in that figure.

the fold as shown in Fig. 15, which when fully flattened down is likethat shown in Fig. 41. This folding is accomplished by instrumentalitiesin addition to the plate, 2, which are as follows: A front gripper, 6,is arranged in front of the blank, gripping the lower ply, 7, of thetube between the two slits, 8 and 9. A pair of triangular blades, 10 and11, pivoted on shafts, 12 and 13, are arranged at the sides of the tubeand in front of the plate, 2, in such a position that their apexes, letand 15, can be swung into the tucks 16 and 17 of the tube 1. Attached tothe outer ends of the blades 10 and 11 are two clips, 20 and 21, shownopen and pivoted to the blades, at 22 and 23. The operation of theseinstrumentalities in folding the bag blank is as follows: The tuckedtube, 1, is placed upon the table, 19, beneath the plate, 2, with enoughof its forward end projecting to make the bottom of abag. The lower plyof the tube is gripped by the gripper, 6, and held to the bed, 19; thenthe triangular blades, 10 and 11, are swung upon their pivots, 12 and13, into the tucks 16 and 17, so that the sides 24 and 25 of the blades10 and 11 correspond in position with the sides 3 and 5 of the plate 2;while the sides 26 and 27, nearly coincide in position with the dottedlines 28 and 29. In this position, and while the plate 2 is in itsraised position, the blades 10 and 11 are rocked, with their clip endsupward, on axes corresponding with the sides 26 and 27 of the blades,and also corresponding with the diagonal dotted lines 28 and 29. Theseblades are shown partly raised in Figs. 9 and 10; which motion of theblades operates to raise the upper plies, 30 and 31, of the blank. Theseplies are raisedstill farther by the upward swinging motion of theblades 10 and 11, as shown clearly in Figs. 11 and 12. In Fig. 11,however, the upper clip ends of the blades are omitted for greaterclearness. In this position the blank assumes the peculiar shape havingbeen stretched flat by the blades 10.

and 11, in connection with the plate 2. This plate 2 being cut away at 3and 5 at an angle of about forty-five degrees, holds the upper plies, 30and 31, while the paper is being stretched over the edges, 24 and 25 ofthe blades lO'a'nd 11. When the inside triangular folds, 33 and 34, arefully stretched out, the blades and 11 are rocked backward from theposition shown in Figs. 11 and 12, to that shown in Figs.13 and 14 andthen Without stopping, to that shown in Fig. 15. During the first partof this backward swing of the blades 10 and 11, the clips and 21 areswunginward against the edges, 24 and 25, of the blades 10 and 11 so asto clip the paper at and 36, thereby holding it during the downwardswing of the blades 10 and 11. During this downward swing, the upperplies, 30 and 31 swing inward under the blades 10 and 11, as shownclearly in Figs. 13 and 14. This folding completes the diamond 37 whichwhen fully flattened, is like the diamond 38, in Fig. 4. During themaking of the fold just described, the plate 2 may bedropped upon theblank 1,-holding it firmlyto the bed, 19; or it may be raised slightlytherefrom. Paste is then applied to the diamond, as shown at 39, and thebag is then completed by folding over the flap 40, upon the diamond 38,and then folding the flap 41 over upon the flap 40, and pressing ittogether upon the bottom of the bag, thus completing it, as shown inFig. 6. By using the front gripper,6,during the diamond folding of theblank, the forward end thereof will be held flat, but it is notnecessary to use this front gripper in connection with the otherinstrumentalities. In this case, during the foldingjust described, theblades 11 and 12, with their clips, 20 and 21, are raised and lowered,

in the manner before described, and. co-operate with the plate 2 infolding the inside triangular folds and laying them down upon the bodyof the blank; after which,instead of assuming the diamond form, 37, theblank assumes a box-like form 42. This box-like form may be collapsedinto the diamond form by pressing inward and downward the two sides, 43and 44. A further modification in the pro- .cess maybe made bypreventing the rear flap, 40, from being folded down flat during the 17and 18, a creaser-blade, 46, is brought down upon the body of the blankat the folded line, 47, and paste-is applied at 48; then the blade 46 iswithdrawn, while the blade is pushed forward, folding over the flap 40as shown in Figs. 19 and 20. The front flap, 41, is then folded overupon the bottom of the blank, and the bag is thus completed.

We claim as our invention- That process of making apaper bag from atucked tube which consists in turning the upper plies of each of thetucked sides up substantially at right angles to the body of the tubeand to each other upon lines corresponding to the angular edges 3 and 5,thus stretching open the inside triangular folds, then folding thoseupturned plies and folds down upon the body of the blank producing thediamond form, and then completing the bag by folding the end flaps, allsubstantially as described.

\VILLIAM A. LORENZ. EDWARD E. OLAUSSEN. lVitnesses:

RALPH M. GRANT, LEWIS N. CRANE.

